loopPhase

Create a new solver phase that can loop a list of other phases.

<solver>
  <termination>timeSpend=10</termination>
  <loopPhase>
     <constructionHeuristic/>
     <localSearch>
        <termination>unimprovedStep=100</>
     </localSearch>
     <ruin>
  </loopPhase>
</solver>

Requirements:

• The loopPhase has a termination (just like any other phase) which controls when it stops looping.
  • That termination is optional, which means it loops forever until the global termination ends.
• There can be multiple phases in the loopPhase => The LoopPhaseConfig has a phaseConfigList just like SolverConfig.
• There can be phases before or after the loopPhase.
  • If the loopPhase has no termination, any phases after it will never run, just like with localSearch without any termination and a phase after it. (maybe we should fail-fast on both those cases?)
• Take special care for the phaseIndex shown in the log messages. both in the "phase ended" and "solver ended" message.
  • Until now, the phaseIndex was set at the solver creation time, but I suspect this will now have to be more dynamic: to be set at the start of the phase.
  • For example if a solver has "CH, Loop (CH, LS, Ruin), LS" and the loop loops 4 times then CH is phase Index 0 and the last LS is phaseIndex 13. If the loop only loops once, the last LS is phaseIndex 4.
  • Until now, the "solver ended" message showed "phase total (2)" even if there was only time enough to run the CH (no time to run a LS). That's a bug I 'd argue. The total phases is then 1 (even though more were configured).